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6.
Electrical scheme of hot water electric boiler of series
“ELTHERM”.
Figure 6.1.
shows the principal electrical scheme of the control board of the hot
water electric boiler of series „ELTHERM”. The
Figure 6.2.
shows the principal
electrical scheme of the control board of the hot water electric boiler of series
„ELTHERM M” and “ELTHERM MM”.
1
1a
1
1a
L
N
S1
S2
SA1
SA2
SA3
SA4
C
2 1
t°
t°
t°
P
C
NO
NC
3 2
1
C
2 1
P
101112
1 2 3 4 5 6 7 8 9
K1
K2
K3
Q1 1 3 5
2 4
6
За
хр
ан
ва
не
N
K1
K2
K3
K2
K3
St
St
A1
A2
A1
A1
A2
A2
HL2
HL1
HL3
FU
1
1X
Q1 - main power supply switch; S1, S2 - switches I and II stage
SA1 – low pressure limit switch; HL1 - signal light – “POWER”;
SA2 - room thermostat;
HL2 - signal light – “ALARM”;
SA3 - emergency thermostat;
HL3 - signal light – “START”;
SA4 - operating thermostat;
P – circulating pump;
Figure 6.1.
Principal electrical scheme of the control board of the hot water
electric boiler of series „ELTHERM”;